TeamSpeak Server cmd_clientsetserverquerylogin race condition

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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4.8$0-$5k0.00

A vulnerability classified as critical has been found in TeamSpeak Server (version now known). This affects the function ServerParser::cmd_clientsetserverquerylogin. The manipulation with an unknown input leads to a race condition vulnerability. CWE is classifying the issue as CWE-362. The product contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently. This is going to have an impact on availability.

The weakness was presented 08/12/2016 by Hanz Jenson as not defined mailinglist post (Full-Disclosure). The advisory is shared at seclists.org. The public release happened without involvement of TeamSpeak. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. Technical details and a private exploit are known.

It is declared as proof-of-concept. The advisory illustrates:

For example using "/../../../etc/passwd" gives "bad path" while "/../../../etc/passwz" gives "no such file". This can be used to determine the remote OS and installed software, enumerate open fds, etc.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

See 90866, 90867, 90868 and 90869 for similar entries.

Productinfo

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CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB CVSS-B Score: 🔍
VulDB CVSS-BT Score: 🔍
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 4.8

VulDB Base Score: 5.3
VulDB Temp Score: 4.8
VulDB Vector: 🔍
VulDB Reliability: 🔍

CVSSv2info

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VulDB Base Score: 🔍
VulDB Temp Score: 🔍
VulDB Reliability: 🔍

Exploitinginfo

Class: Race condition
CWE: CWE-362
ATT&CK: Unknown

Local: No
Remote: Yes

Availability: 🔍
Access: Private
Status: Proof-of-Concept
Price Prediction: 🔍
Current Price Estimation: 🔍

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔍

Timelineinfo

08/12/2016 🔍
08/19/2016 +7 days 🔍
03/30/2019 +953 days 🔍

Sourcesinfo

Advisory: seclists.org
Researcher: Hanz Jenson
Status: Not defined
scip Labs: https://www.scip.ch/en/?labs.20161013
See also: 🔍

Entryinfo

Created: 08/19/2016 14:13
Updated: 03/30/2019 23:27
Changes: 08/19/2016 14:13 (42), 03/30/2019 23:27 (1)
Complete: 🔍

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